Bulletin of Data Analysis of Japanese Classification Society
Online ISSN : 2434-3382
Print ISSN : 2186-4195
Current issue
Displaying 1-3 of 3 articles from this issue
Article
  • Yejia Liu, Mingzhe Jin
    Article type: Article
    2022 Volume 11 Issue 1 Pages 1-14
    Published: August 01, 2022
    Released on J-STAGE: September 29, 2022
    JOURNAL FREE ACCESS FULL-TEXT HTML

    Authorship attribution is a branch of text classification that can be used to identify the author of a text from a set of possible candidates. Orthodox authorship attribution studies usually utilize texts pertaining to a single genre as the target corpus, but this tacit requirement is often not satisfied in real-world scenarios. To address this issue, we explored the possibility of using a multi-genre mingled corpus for authorship attribution in this paper. In particular, we selected fictional pieces and essays of five Japanese writers and identified their authors based on combinations of 14 features and at most seven classifiers while varying the number of possible candidates. Further, we evaluated the susceptibilities of these combinations in a more complicated scenario in which two writers have works in multiple genres. The experimental results demonstrate that a multi-genre mingled corpus is suitable for authorship attribution and that a satisfactory attribution performance can be achieved using appropriately chosen features and classifiers.

  • —Based on the Survey Data Collected in Tokyo in 2016—
    Yanyan Chen
    Article type: Article
    2022 Volume 11 Issue 1 Pages 15-36
    Published: August 01, 2022
    Released on J-STAGE: September 29, 2022
    JOURNAL FREE ACCESS FULL-TEXT HTML

    This research explores the relationship between environmental consciousness and proenvironmentalbehaviors and aims to clarify factors that inhibit the conduction of thesebehaviors by considering pro-environmental behaviors at both private and social levels.Data analysis of responses to a mail survey of Tokyo residents (among registered monitors)showed a general consistency between people’s environmental consciousness and their behaviors.However, the lack of knowledge and methods, and the belief in low behavior efficacywere proved to be important inhibiting factors. In addition, the demographic characteristicsof people who tends to have pro-environmental behaviors and those who do not wereanalyzed. Finally, there were proposals to promote pro-environmental behaviors among thepeople who do not have them.

Research notes
  • Kiyohisa Shibai
    Article type: Research notes
    2022 Volume 11 Issue 1 Pages 37-50
    Published: August 01, 2022
    Released on J-STAGE: September 29, 2022
    JOURNAL FREE ACCESS FULL-TEXT HTML

    This study summarizes international opinion on nuclear disarmament issues using a metaresearch design. This study aimed to clarify the characteristics of public opinions by country.In an international community where nuclear disarmament is stagnant, the search formeans other than diplomacy to encourage disarmament is an important issue. To encouragechanges in national security policy, states need to recognize that the expected utility ofnuclear disarmament is larger than the status quo, even given the existence of nuclear deterrence. Public opinion is one important independent variable that affects the government. By focusing on public opinion, this study aims to design international surveys on people’svalues regarding nuclear issues and analyze the influence of public opinion. This studyclassifies states into four groups: a country to have ever suffered atomic bombings, nuclearpowers, potential nuclear powers, and non-nuclear states. Comparative data analyses aredone within a state, between states, and between groups These analyses lead to conclusionsthat can help shape public opinion in favor of nuclear disarmament.

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